#include <iostream>
#include "asio.hpp"

class printer
{
public:
    printer(asio::io_context& io): timer_(io, asio::chrono::seconds(1)), count_(0)
    {
        std::cout << "Begin count is " << count_ << std::endl;
        timer_.async_wait(std::bind(&printer::print, this));
    }

    ~printer()
    {
        std::cout << "Final count is " << count_ << std::endl;
    }

    void print()
    {
        if(count_ < 5)
        {
            std::cout << count_ << std::endl;
            ++count_;
            timer_.expires_at(timer_.expiry() + asio::chrono::seconds(1));
            timer_.async_wait(std::bind(&printer::print, this));
        }
    }

private:
    asio::steady_timer timer_;
    int count_;
};

int main()
{
    asio::io_context io;
    printer p(io);
    io.run();
    return 0;
}